Electric apparatus for driving clocks or similar mechanism.



H.v E. WARREN. ELECTRIC APPARATUS FOR DRIVING CLOCKS 0R SIMILARMECHANISM.

APPLICATION FILED JAN. 27, 19H.

Patented J une 6, 1916.

2 SHEETS-SHIEET I.

INVENTOR.

WITNESSES H. E. WARREN. ELECTRIC APPARATUS FOR" DRIVING CLOCKS 0RSIMILAR MECHANISM. APPLICATION FILED JAN-27,1911.

' 1,186,459, Pa ed Jnne 6, 1916.

HEETS-SHEET 2.

CD F Pg I WITNESSES INVENTOR.

" N6. 574,092,- filed July 27, 191.0, and

I prefer to use but this device maybe u'tii In fact, sometimes thedriving eiiect inlum.

pulses were uniform; and continually .re-'

. available.

. above named,

HENRY E. WARREN, or Asnnnnnimnssncnusn rrs,

COMPANY, OF YOBTLAND, MAINE A COREORATION OF ELECTRIC nrrnnerus'FOR-DRIVING CLOCKS on s mi tnn MECHANISM.

17 0 all whom it may concern:

Be it known that- I, HENRY E. WAnREN',

a citizen of the United States of America,.

and resident of Ashland, in the county. of Middlesex and; Commonwealthof Massachusetts, have invented Improvements in Electric ApparatusforDrivingOlocks or Similar Mechanism, of which the following.

is a specification. 1

for impartingenergy-to a swinging pendulum or vibrating particularservice "in tact-making devices, is referred to in my applicationsSerial- No. 53,4t,686, filed December 23,1909 and connection withconwhich lized in connection with any electriccircuit inwhich periodic.impulses of current are For :ekample, clocks equipped with pendulums oroscillating wheels of this form may .be' connected in circuit with (amaster clock and'thus'be moved synchronously therewith.

This inventiongconsists' in the arrange ment of mechanism by which useis made of both attractiomand repulsion between a per-1 m'anent m'agnetand a conductor 'carryingan.

electric current. v I am aware that prior .to my, appllcations bymeans'of eitherthe attraction or repul sion between a permanent magnet. and ajelectric current, .but

- these prior inventionshave. beendefe'ctive in the followingparticulars 1- conductor. carrying an v1. The, driving efiect wasindependent; of

amplitude of swing of the pendulum, being substantially constant whethera "pendulum was swinging through a small or a large are.

creased with the are of SWlIlgOf thependu- As a consequence, if theelectric imcurring there weuld'beino special tendency forjthe pendulumto vibrateovera constant arm-except as the energy absorbedin frictionetc.-balancedthe' energy imparted.

1 hitherto been used, in any. electrically driven.- pendulum, fromavertical position of the support. for the pivot 2. So far as I amaware, no'means have to compensate" for variations of the pendulum,without interfering with the amplitude of its swing, v

Specifieatien'of Letters Patent.

Application filed January 27,1911.

This invention. .relates to improved means balance-wheels, and is of,

such, for instance, as-

Serial.

pendulums have been driven.

' specificatiom-Figxire sea -.1 in. 605,066.

In, order to accomplish the improved re sults, I arrange the conductorcarrying the that for periodic impulses there willbe a positive drivingeffect owing to theattraction or repulsion between the magnet and :theconductor when the or balance wheel is swingingpendulum ssielvon. 'romam: cno'cK mama June 6,1916.

[current 1n such .a manner with respect to. i the permanent magnetthrough its normal arc even though the outf side'frictional effects-arevariable.

Variations in'the said vertical position oi the supportfor the pendulumare compensated for in the specific formflof devices illustrated, bymounting both thepennanent -,magnet and, he repelling or attracting con-'ductor on separate supports, upon one of which the oscillating devicecan swing" freely. The other device, however',-i'sm oi1nt-' ed so'thatit can swing in response to varia-q I j tionsfrom a vertical position ofthe support for its pivot and thus preservea. p ra c-.

tically' constantrelation to the freely SWlIlgmg deVlCQ; but ispreferably subject to sufiicient friction orother restraining efiectjtoprevent-it fremswinging in response to the electromagnetic impulses.

me'nt does not necessarily involve the use-of a permanent magnet,v Theconductor may electro-magnet, to induce magnetism in soft ironforfsteel,and thereby effect.

In the drawings arrangement shown. in my said of the prior I applicationnet and electrical "coil, the'latter beingheld ina fixed position, thecircuit closing device being. a {small mass a front elevation ofde'v'ces; Fig. 3 shows another arra'ngernent of the I oscillating magnetand electrical -coil,'b'y which the electric current in thecoil retardsthe swing of the oscillating-devi'ce when above normal and .the twoforming a part ofithis 1 is .a front elevation No. 534,686 ofpermanent-mag This improvelthough I prefer it. be utilized throughcan -85 produce a similar v of mercury inanexhausted tube; Figl2is theimproved manner of supporting the two oscillating poles o fthemagnetareover difli'erent portionsofth'e coil'; Fig. 4 is a modification of "themanner of supporting the fmagnet'and ,coil; Fig. 5 is an "'cillatingdevice in elevation showing the-osthe, .form of a spring balanced-wheeL-7 Referring to the" drawings, nent magnet. mountedupon a pendulum-rod B,or other oscillating device, 1

I lit In Figs. 1, 2 and fl the air-gape of the magnet is preferablyarranged so that the 'lines of force are approximately radial to thepivotal support P, and the nonductor is arranged in the form of a flatcoil C having fering with the coil.

In Fig. 1 the coil is shown fixed in posi tion and as thus arranged itwould be utilized in connection with clocks permanently fastened inposition, such as wallclocks. The normal limit of swing of the pendulumtoward the right is shown by the dotted lines and is the minimumpermitted for the operation of the escapeinent devices. I11 the dottedposition the air-gap of the magnet has passed through the left handsection of the coil and-has received energy from so doing. Any fartherswing would cause the air-gap to cut across the section of thecoil tothe right of its axis, and in doing so energy would be subtracted fromthe pendulum for the reason that the conductors in the section to theright of the axisare carrying current which in relation to the magnet Ais moving in the opposite direction from that in the left hand position,

In Fig. 2 the permanent magnet A is mounted upon the pendulum-r0d B andthe coil C'is mounted upon another pendulumrod D with a counterweight E.Therod B is supported by a flexible strip F, while the rod D is mountedupon a pivot Q which is made to offer appreciable frictional resistanceto the free swinging of the pendulumrod D. The friction of Q, however,is not sufficient to prevent the center of gravity of the systemcomposed of C, D and E from assuming a perpendicular position below Q,but the'frictibn at' pivot Q is-suflicient to prevent any objectionablemovement of G on account of-the electro-magnetic impulses which aresuflicient to maintain the swing of pendulum-rod B,'and so far asaffecting the proper operation of the mech anism is coneernedanymovement of C, if thus produced, is negligible. .A clock 'equipped withthis device will maintain a constant arc of swing of its pendulum, eventhough the supporting frame-Work of the clock is out of level. v

InFig. 3 is shown another arrangement for maintaining a constant arc ofIn this case, however, the reversed direction of the lines ofmagneticforce passing out of one pole of a horse-shoe magnet and swing.

intoanother pole, is employed to limit the swing across electricconductors through which current is flowing in a single direction inrelation to the magnet. hen the magnet A is in the position shown in thesolid lines, there is a tendency to cause it to niove toward the right,across the upper surface of coil C which is shown in section with itsaxis substantially parallel with the arc of swing of the magnet A. Asthe pendulum swings farther to over, into the position shown by thedotted lines, the reversed magnetic lines of. the.

left-hand pole of magnet A, cut across the conductors of coil C andthereby tend to prevent farther swing.

Fig. l s substantially the same as Fig. 2, except thatthc pendulum D onwhich the coil C'is mounted is, arranged to swing freely, and the magnetA mounted on its pendulum B is made to swing less freely, as by frictionat its supporting pivot P.

In Fig. 5, a balance-wheel-II is shown which receives impulses from therepulsion orattraction between the permanent magnet A and the coils C,C. The same reasons for-maintaining a constant arc of vibration exist inthis arrangement as with the pendulums; when the magnet A swings overthe coils upon one side of t11eir-ccnters,.it is attracted by thecurrent flowing through the coils upon that side, and when the magnetswings past the center of the coil it is repelled by the current passingthrough that side. The wheel II is counterbalanced by a spring S.

I claim Means for imparting energy to an oscillating device, consistingof a restrained pen- .dulum and a freely swinging pendulum, a

HENRY E. WARREN.

Witnesses J OSEPHINE H. RYAN, FLO ENCE A. COLLINS.

the right, how-

